Combination jack and jointer plane



J. H. DEVINE May 27 1924.

COMBINATION JACK AND JOINTER PLANE Filed June 1, 1923 g vum xtoz Jab/2f! Qewiae.

Patented May 27, 1924.

warren JOHN H. DEVINE, OF DENVER, COLORADO.

COMBINATION JACK Ann JOINTER PLANE.

Application filed June 1,

cvact description of the invention, suchas will enable others skilled inthe art to which it appertains to make and use the same, refs-Q erencebeing had to the accompanying drawings, and to the characters ofreference marked thereon, which form a part of this specification.

This invention relates to improvements in carpenters planes, and hasspecial reference to an attachment by means of which the stock can beincreased and whereby an ordinary jack-plane can be readily convertedinto and used for a jointer.

In order to be in position to do the various jobs that are necessary inbuilding and other carpenter work, it is essential that a carpentershall have the proper tools. Among other things, he must have ajack-plane and a jointer-plane. The main distinction be tween these twotypes of planes is one of length, a jack-plane being anywhere from 12 to17 inches in length while a jointerplane is f om 28 to 30 inches long.The jack-planes. as manufactured and. sold today, are all ofsubstantially the same length and width, being approximately 14 incheslong and 2% inches wide, while the jointerplanes are substantially 24inches long and 2% inches in width and weight approximately eightpounds.

As the only real distinction between a jack-plane and a jointer is oneof length only, it is apparent that, by providing a suitable attachmentthat can be readily secured to and removed from the jack-plane and bymeans of which the effective length of the stock can be increased, thejack-plane can he used as a jointer.

It is the object of this invention to produce an attachment which shallbe light and rigid, and which shall be provided with means by which itcan be secured to a jackplane of ordinary construction for increasingthe effective length thereof. By means of my attachment, the jack-planecan be made to do the work of a jointer-plane and therefore it will beunnecessary for the carpenter to go to the expense of buying more 1923.Serial No. 642.741. i

than one plane. As a jointer-plane weighs about eight pounds, while theattachment is comparat vely light, it is evident that less weight Wlllhave to be carried about.

In order to more clearly show and describe w my invention, I shall havereference to the accompanying drawing in which thefpreferred formthereof is shown and in' which: Fig. 11s a perspective viewof a jackplane, to which my attachment has been ap plied;

Fig. 2 is a section taken on line 2-2, Fig. 1; i

Fig. 3 is a. top plan view of my attachment looking in the direction ofarrow 3, in

Fig. 4.

Fig. 4 is'a side view ofmy attachment; and I Fig. 5 is a bottom planview. looking in the direction of the arrow 5 in Fig. 4.

The same reference characters will be used to designate the same partsthrough the several views.

Numeral 1 represents the stock of a jackplane which is provided withtheordinary iron 2, breaker iron 3. wedge 4, and toat 5 My removableextension member 5 is made of cast metal or of pressed steel and has aflat bottom or sole 6 whose length is ap priximately 24 inches and whoseoutside width is about 2 inches. The sole 6 is formed in two parts,joined by vertical sides 7 which are upwardly arched in the manner shownin Figs. 1 and 4. The distance between the inner surfaces of sides 7 isequal to the width of the jack-plane and the distance between the innerends of the sole sections 6 (indicated by numerals 8 and 9) is equal tothe length of the sole of the stock of the jack-plane. The metalportions marked 10 and 11 are pressed upwardly in the manner indicatedin Fig. 4 to a distance which is equal to or slightly greater than thethickness of the material in the sole of the jack-plane stock. Theupwardly pressed portions 10 and 11 are each provided with three spacedholes for the reception of the screws 12, 13 and 14, the purpose ofwhich will hereinafter appear. The ends of the jack-plane are perforatedand threaded for the reception of screws 13 which serve to clamp thejack-plane to the attachment in the manner shown in Fig. 2. As it isessential that the sole of the plane and that of the attachment shall bein one plane, the screws 12 and 14 are provided for too no i

the purpose ofmaking the necessary adjust ments." Screws l2 and 14 arethreadedly connected to the plane attachment, while screw 13 is threadedto the sole of the plane. Therefore by means of these, three screws ateach end, the plane and the attachment may be accurately adjusted sothat the surfaces of the soles will coincide. The screws 12 and 14,after they have'been once adjusted to fit a certain plane, will not haveto be moved, and therefore the attachment can be securedto the plane bymerely operating the screw 13.

It is my intention to form the attachment fromva piece of steel plateabout of an inch in thickness, as they can then be presses outby meansof a die. They can, however be cast from steel or a good grade of castiron. The'arched sides 7 give the device the requisite rigidity so thatthe sole will not become curved when subjected to ordinary strains.

From the foregoing, it willloe apparent thatI have invented anattachment that can having now described my invention, 1 claim is:

1. An article of manufacture comprising a pair of plane soles spacedapart and connected along their outer edges by means oi? parallel ribsor flanges, said soles having their inner ends oi'iset to providerecessed portions adapted toreceive the ends of jack-plane; andadjusting screws threadedly connected to each offset portionv 2. .5111article of manufacture comprising a pair of plane soles spaced apart andconnected along their outer edges by means of parallel ribs or fiaies,said soles having their inner ends offset in an upward direction toprovide recess .1 portions adapted to receive the ends of jack plane, ascrew rotatably connected to the center of each oii'set portion saidscrew being; freely rotatable therein and adapteo to be threaded-- lyconnected to the jack plane, and an ad justing screw threadedlyconnected with each offset portion on each side of the firstmentionedscrew, said screws being adapted to engage respective sides of the ackplane for purpose of adjustment.

in testimony whereof l afiix my signature.

' JOHN H; nnvinn.

